What kind of smoothie can I make?

I have in my house: 1/2lb of strawberries, 1lb of blueberries, some apples, some peaches, some lemons and a watermelon. I don't have any yogurt or ice cream. I'm new to smoothies, trying to eat healthy now, and I looked for recipes with the stuff I have but everything I found needed yogurt or ice cream or something else I didn't have. Thank you for reading